An automatic electrical fireproof cabinet

Abstract

This application discloses an automatic electrical fireproof cabinet, relating to the field of electrical automation. It includes a distribution cabinet body, an internal fire monitoring component for monitoring fire conditions, and a fire extinguishing component for automatically extinguishing fires upon detection. The surface of the distribution cabinet body also includes a flow guiding component to assist in the diffusion of the extinguishing agent. The flow guiding component includes a flow guiding cylinder fixed to the side of the distribution cabinet body near the surface of the fire extinguishing pipe. The flow guiding cylinder has a flow guiding cavity inside for airflow. One end of the flow guiding cylinder is perpendicularly inserted at a 90-degree angle into the surface of the distribution cabinet body near the thermal aerosol fire extinguishing device. This application utilizes a universal nozzle in the fire extinguishing component to flexibly adjust the extinguishing angle, which, in conjunction with the airflow of the flow guiding component, accelerates the diffusion speed of the extinguishing agent within the distribution cabinet body and enhances its coverage, thereby improving the fire extinguishing effect.

Description

Technical Field

[0001] This application relates to the field of electrical automation, and in particular to an automatic electrical fireproof cabinet. Background Technology

[0002] During the operation of electrical equipment, electrical fireproof cabinets, as one of the core devices to ensure the safe and stable operation of the power distribution system, integrate a large number of precision electrical components, cable joints and busbars. Under long-term high load and high voltage working environment, these components are very prone to fires due to problems such as aging of lines, poor contact and short circuits.

[0003] The existing publication number CN212282621U discloses a fireproof electrical control cabinet, but it still has the following shortcomings in actual use:

[0004] During use, the diffusion of the extinguishing agent within the control cabinet relies mainly on natural convection. Due to the complex internal structure of the cabinet (such as metal partitions and dense component layout), the diffusion path is tortuous and the speed is slow, making it difficult to evenly cover the entire cabinet space in a short time. This reduces the extinguishing efficiency and can lead to more serious chain reactions as the fire spreads, causing equipment to burn or even endangering the safety of the surrounding environment. Utility Model Content

[0005] In order to improve the problem that fire extinguishing agents are difficult to uniformly cover the entire cabinet space in a short time, thus reducing the fire extinguishing efficiency, this application provides an automatic electrical fireproof cabinet.

[0006] The automatic electrical fireproof cabinet provided in this application adopts the following technical solution:

[0007] An automatic electrical fireproof cabinet includes a distribution cabinet body, wherein a fire monitoring component for monitoring fire is installed inside the distribution cabinet body, and a fire extinguishing component for automatically extinguishing fire after detecting fire is installed on the surface of the distribution cabinet body.

[0008] The fire extinguishing assembly includes a fire extinguishing pipe fixed on the surface of the power distribution cabinet body. One end of the fire extinguishing pipe located inside the power distribution cabinet body is equipped with a universal nozzle for adjusting the fire extinguishing angle. The surface of the power distribution cabinet body is equipped with a flow guiding assembly for assisting the diffusion of the fire extinguishing agent.

[0009] The flow guiding assembly includes a flow guiding tube fixed on the side of the power distribution cabinet body near the surface of the fire extinguishing pipe. The flow guiding tube has a flow guiding cavity inside for airflow. The end of the flow guiding tube near the power distribution cabinet body is inserted vertically at 90 degrees on the side of the power distribution cabinet body near the surface of the thermal aerosol fire extinguishing device.

[0010] By adopting the above technical solution, when the fire monitoring component detects a fire inside the distribution cabinet, it controls the fire extinguishing component to start and extinguish the fire inside the distribution cabinet. At the same time, it controls the flow guiding component to start, so that the flow guiding component generates a vertical airflow, thereby driving the fire extinguishing agent to penetrate the gaps in the equipment and reducing the diffusion time of the fire extinguishing agent.

[0011] Preferably, the fire monitoring component includes an arc sensor and a temperature sensor disposed inside the power distribution cabinet body. The power distribution cabinet body is equipped with a smoke sensor for monitoring smoke inside the power distribution cabinet body. The temperature sensor is located between the arc sensor and the smoke sensor. The arc sensor, temperature sensor, and smoke sensor are electrically connected to a miniature fan.

[0012] By adopting the above technical solutions, arc sensors can monitor arc faults in electrical circuits and detect potential fire hazards in a timely manner. Temperature sensors can monitor the temperature inside the cabinet in real time and send a signal when the temperature exceeds a set threshold. Smoke sensors can detect the smoke concentration inside the cabinet and send a signal when the smoke concentration reaches a certain level. Thus, the fire can be automatically detected in the event of an electrical fire.

[0013] Preferably, the power distribution cabinet body is equipped with a power supply sealing component for automatically cutting off the power supply in the event of a fire;

[0014] The power supply enclosure includes a main circuit breaker fixed inside the distribution cabinet body. The main circuit breaker is electrically connected to an arc sensor, a temperature sensor, and a smoke sensor. A secondary circuit breaker is provided on one side of the surface of the main circuit breaker and is electrically connected to the arc sensor, the temperature sensor, and the smoke sensor. The secondary circuit breaker is activated when the main circuit breaker fails and cannot cut off the power supply.

[0015] By adopting the above technical solution and using a dual design of main circuit breaker and auxiliary circuit breaker, it is ensured that the power supply can be reliably cut off in the event of a fire, thus preventing the fire from spreading due to the failure to cut off the power supply.

[0016] Preferably, the fire extinguishing assembly further includes a thermal aerosol fire extinguishing device fixed on the surface of the power distribution cabinet body, and the end of the fire extinguishing pipe away from the universal nozzle is fixed on one side of the surface of the thermal aerosol fire extinguishing device.

[0017] By adopting the above technical solution, the fire extinguishing component can evenly spray the fire extinguishing agent into the interior of the distribution cabinet, extinguishing the fire inside the distribution cabinet. Moreover, the fire extinguishing agent used has minimal pollution to the distribution cabinet body and will not affect the subsequent use of the equipment.

[0018] Preferably, a miniature fan for generating airflow is fixed to the inner wall of the flow guiding cavity, and a flow guiding plate is fixed inside the flow guiding cavity. A flow guiding hole for dispersing airflow is opened on one side of the surface of the flow guiding plate.

[0019] By adopting the above technical solution, airflow is directed through the guide hole, changing the direction of airflow and reducing the impact of airflow on electronic components inside the distribution cabinet.

[0020] Preferably, the micro fan is in a closed state when the arc sensor, temperature sensor, and smoke sensor do not detect a fire, and the micro fan is in a closed state after the arc sensor, temperature sensor, and smoke sensor detect a fire.

[0021] By adopting the above technical solution, the micro fan is controlled to open and close according to the fire status inside the power distribution cabinet by the arc sensor, temperature sensor and smoke sensor. Then, when the thermal aerosol fire extinguishing device is activated, the micro fan is opened at the same time, so that the airflow produced by the micro fan accelerates the speed at which the fire extinguishing agent in the thermal aerosol fire extinguishing device reaches the fire point.

[0022] Preferably, both the guide tube and the guide hole are made of stainless steel.

[0023] By adopting the above technical solution, and by making the guide tube and guide hole stainless steel, the guide tube and guide hole can withstand the instantaneous high temperature during hot aerosol fire extinguishing and the continuous high temperature in the fire environment, so that the guide tube and guide hole will not deform or melt during the fire extinguishing process.

[0024] Preferably, an audible and visual alarm light for issuing an alarm is fixed on the side of the power distribution cabinet body near the fire extinguishing pipe.

[0025] By adopting the above technical solution, when the arc sensor, temperature sensor, and smoke sensor detect a fire inside the distribution cabinet, the sound and light alarm lights are activated to alert the staff that a fire has occurred inside the distribution cabinet, allowing the staff to stay away from the area and ensure their safety.

[0026] In summary, this application includes at least one of the following beneficial technical effects:

[0027] 1. The universal nozzle in the fire extinguishing assembly can flexibly adjust the fire extinguishing angle and cooperate with the airflow of the flow guiding assembly to accelerate the diffusion speed of the fire extinguishing agent in the power distribution cabinet and enhance its coverage. This effectively solves the problems of fixed fire extinguishing angle and slow fire extinguishing agent diffusion, thus improving the fire extinguishing effect.

[0028] 2. Through the coordinated monitoring of arc sensors, temperature sensors, and smoke sensors, fire can be accurately identified. At the same time, the power supply sealing component is linked to achieve dual power outage. Combined with the fire extinguishing component and the flow diversion component, fire can be extinguished quickly. By adopting a full-process coordinated response mechanism of "monitoring-power outage-fire extinguishing", the fire can be controlled in the initial stage, reducing equipment damage and safety hazards caused by fire, and significantly improving the overall safety performance and emergency handling efficiency of the power distribution cabinet. Attached Figure Description

[0029] Figure 1 This is a three-dimensional structural diagram of the present application;

[0030] Figure 2 This is a three-dimensional structural diagram from another angle of this application;

[0031] Figure 3 This is a schematic diagram of the internal structure of the power distribution cabinet body in this application;

[0032] Figure 4 For this application Figure 3 Enlarged view of point A in the middle;

[0033] Figure 5 For this application Figure 3 Enlarged view of point B in the middle;

[0034] Figure 6 This is a three-dimensional structural diagram of the fire extinguishing component of this application;

[0035] Figure 7 This is a three-dimensional structural diagram of the flow guiding component of this application.

[0036] Attached reference numerals: 1. Distribution cabinet body;

[0037] 2. Fire monitoring components; 21. Arc sensor; 22. Temperature sensor; 23. Smoke sensor;

[0038] 3. Power supply enclosure components; 31. Main circuit breaker; 32. Auxiliary circuit breaker;

[0039] 4. Audible and visual alarm lights;

[0040] 5. Fire extinguishing components; 51. Thermal aerosol fire extinguishing device; 52. Fire extinguishing pipe; 53. Universal sprinkler head;

[0041] 6. Flow guiding assembly; 61. Flow guiding tube; 611. Flow guiding cavity; 62. Miniature fan; 63. Flow guiding plate; 631. Flow guiding hole. Detailed Implementation

[0042] The following is in conjunction with the appendix Figures 1-7 This application will be described in further detail.

[0043] This application discloses an automatic electrical fireproof cabinet.

[0044] Reference Figure 1 An automatic electrical fireproof cabinet includes a distribution cabinet body 1, and the distribution cabinet body 1 includes:

[0045] I. Cabinet Frame

[0046] The cabinet frame is the basic structure of the distribution cabinet, providing support and protection. It mainly includes:

[0047] Uprights and beams: Made of cold-rolled steel plates (2-3mm thick) or aluminum alloy profiles welded / bolted together to form a rectangular frame, which determines the size and load-bearing capacity of the cabinet (usually capable of supporting 500-1000kg of equipment weight).

[0048] Side panels, top panels, and bottom panels: The side panels and top panels are mostly detachable for easy installation and maintenance; the bottom panel has cable inlet holes (with rubber sealing rings to prevent dust and rodents), and the bottom panel of some distribution cabinets can be raised to form a cable trench space.

[0049] Cabinet doors: including the front door (main operating panel) and the rear door (maintenance panel). The front door is usually equipped with an observation window (tempered glass), operating handle and instruments. The rear door is closed or mesh-like (for ventilation). Grounding devices and anti-misoperation interlocking mechanisms (such as "five-proof" interlocking) must be installed between the cabinet door and the frame.

[0050] II. Internal Functional Area Division

[0051] Based on the layout and function of the electrical equipment, the cabinet is usually divided into multiple independent areas, separated by metal partitions (fire resistance rating ≥ IP3X) to prevent the spread of faults.

[0052] Busbar compartment (main busbar area)

[0053] Located at the top or back of the cabinet, the main busbar (copper or aluminum, cross-section selected according to rated current, such as 50×5mm copper busbar for 1000A) is installed to distribute power to each branch circuit. The busbar needs to be covered with insulating sleeves or installed on insulating supports. The phase-to-phase and phase-to-ground distances meet the electrical clearance requirements (≥20mm for low-voltage cabinets, ≥125mm for high-voltage cabinets).

[0054] Circuit breaker room (switch area)

[0055] The installation of circuit breakers (such as universal circuit breakers and molded case circuit breakers) and branch circuit breakers is the core area of ​​current control. The circuit breakers are directly fixed on the guide rails, and the incoming and outgoing terminals are connected to the busbar compartment and cable compartment through copper busbars.

[0056] Cable room (inbound / outbound cable area)

[0057] Located at the bottom or lower part of the cabinet, it is used to connect external cables (the incoming cable is introduced from the bottom of the cabinet, and the outgoing cable is led out from the side or bottom). The internal parts are equipped with cable terminals, current transformers, grounding switches, etc. The cables must be fixed on the cable brackets to avoid the joints from loosening due to stress.

[0058] Secondary control room (instrument area)

[0059] Typically located inside the front door of the cabinet or in a separate small room, it houses control circuit components such as relays, contactors, instruments (ammeters, voltmeters), PLC modules, indicator lights, etc., which are connected to the main circuit through secondary wiring to achieve monitoring and control of the main circuit.

[0060] Fire extinguishing equipment area (for fire prevention only)

[0061] In automatic electrical fireproof cabinets, a separate fire extinguishing device area needs to be set up, where thermal aerosol generator containers, nozzles, pipes, etc. are installed, maintaining a safe distance from other areas (to avoid the impact of high temperatures), and the nozzles need to be oriented to cover all electrical areas.

[0062] III. Auxiliary Facilities

[0063] Cooling system

[0064] These include ventilation louvers (natural heat dissipation), axial fans (forced heat dissipation, which automatically start when the temperature inside the cabinet exceeds 40°C), and some high-voltage cabinets use heat pipe radiators or water cooling systems to ensure that the equipment operates at the rated temperature (usually ≤70°C).

[0065] lighting fixtures

[0066] LED lights are installed inside the cabinet and are linked to the cabinet door (the lights automatically turn on when the door is opened and turn off after a delay when the door is closed), making it easy to check the internal condition during maintenance.

[0067] Grounding system

[0068] The cabinet frame, metal partitions, and equipment casing are connected by grounding copper busbars and ultimately connected to the grounding grid (grounding resistance ≤ 4Ω) to prevent the cabinet from becoming energized when the equipment leaks current.

[0069] Fireproof sealing

[0070] Cable entry and exit holes and busbar passages through partitions are sealed with fireproof putty or fireproof sealing modules to prevent the spread of flames and smoke in the event of a fire.

[0071] It should be noted that the main body of the power distribution cabinet 1 is used in the joint workshop (including the elevated warehouse) and the underground parking garage.

[0072] Reference Figures 3-5The distribution cabinet body 1 is equipped with a fire monitoring component 2 for fire monitoring. The fire monitoring component 2 includes an arc sensor 21 installed inside the distribution cabinet body 1. The arc sensor 21 is used to monitor arc faults in electrical circuits. The arc sensor 21 is installed on the cable of the main incoming circuit breaker of the distribution cabinet body 1 and on the important branch circuit (such as the power circuit). The ring iron core of the arc sensor 21 is wrapped on a single phase wire (or neutral wire) without disconnecting the line. The arc is judged by monitoring the distortion of the current waveform. It is ensured that the cable passes through the center of the iron core (deviation ≤ 5mm) to reduce measurement error. It is fixed near the cabinet cable tray (close to the cable being tested) and kept at a distance of more than 30mm from the power line. Shielded wire is used to transmit the signal to reduce electromagnetic interference.

[0073] The distribution cabinet body 1 is equipped with a temperature sensor 22 for monitoring the internal temperature of the distribution cabinet body 1. The temperature sensor 22 is installed in the area of ​​busbar joint, circuit breaker and cable connection terminal, and disconnector switch contact inside the distribution cabinet body 1. The temperature sensor 22 probe is directly fixed to the surface of the monitoring point with a high-temperature resistant clip (metal material), or it is pasted with thermally conductive silicone (to ensure tight contact and temperature measurement error ≤ ±1℃). At the same time, the wire of the temperature sensor 22 must be run through an insulating sleeve (such as polytetrafluoroethylene tube) and kept at a safe distance of more than 50mm from the busbar to avoid short circuit.

[0074] The power distribution cabinet body 1 is equipped with a smoke sensor 23 for monitoring smoke inside the power distribution cabinet body 1. The smoke sensor 23 is fixed to the top inner wall of the power distribution cabinet body 1 by screws or clips. The detection surface of the arc sensor 21 faces downward (vertically downward) to ensure that smoke enters the detection chamber from below. The temperature sensor 22 is located between the arc sensor 21 and the smoke sensor 23.

[0075] Arc sensor 21 monitors arc faults in electrical circuits to promptly detect potential fire hazards. Temperature sensor 22 monitors the temperature inside the cabinet in real time and sends a signal when the temperature exceeds a set threshold. Smoke sensor 23 detects the smoke concentration inside the cabinet and sends a signal when the smoke concentration reaches a certain level. Thus, the system can automatically detect fires in the event of an electrical fire. Through the diversified monitoring of arc sensor 21, temperature sensor 22, and smoke sensor 23, the system can automatically detect fires in the event of an electrical fire, thereby achieving early warning and accurate identification of electrical fires. This buys time for quickly cutting off the power supply and activating fire extinguishing devices, minimizing fire losses.

[0076] Reference Figures 3-4The power distribution cabinet body 1 is equipped with a power supply enclosure 3 for automatically cutting off the power supply in the event of a fire. The power supply enclosure 3 includes a main circuit breaker 31 fixed inside the power distribution cabinet body 1. The main circuit breaker 31 is installed on a vertical guide rail (such as a 35mm DIN rail) inside the power distribution cabinet body 1 and is fixed with bolts to ensure a firm connection with the cabinet frame (vibration resistance level ≥ IP2X). A secondary circuit breaker 32 is provided on one side of the surface of the main circuit breaker 31. The secondary circuit breaker 32 is installed on the same side below the main circuit breaker 31. The installation method of the secondary circuit breaker 32 is the same as that of the main circuit breaker 31. The secondary circuit breaker 32 is activated when the main circuit breaker 31 fails and cannot cut off the power supply.

[0077] It should be noted that: the user needs to install a control system module (such as a microprocessor) inside the distribution cabinet body 1, and connect the control system module to the arc sensor 21, temperature sensor 22, and smoke sensor 23. The main circuit breaker 31 and the auxiliary circuit breaker 32 are connected to the control system module. The control system module receives signals from the arc sensor 21, temperature sensor 22, and smoke sensor 23 in real time, and determines whether the "fire conditions" are met through preset logic.

[0078] When a single sensor alarms (such as only the temperature exceeds the limit), the system only issues a warning and does not trigger the operation of the main circuit breaker 31 and the auxiliary circuit breaker 32.

[0079] When two or more sensors alarm simultaneously (such as electric arc + excessive temperature, smoke + electric arc), the system determines it as a "real fire" and initiates the power-off procedure.

[0080] Upon confirmation of the fire, the control system module immediately outputs a control signal: it prioritizes triggering the main circuit breaker 31 to trip (outputting the signal within 0.1 seconds) to cut off the main power supply; if no tripping feedback signal is received from the main circuit breaker 31 within 1 second (the auxiliary contacts are not disconnected), it immediately triggers the auxiliary circuit breaker 32 to trip, ensuring reliable power disconnection.

[0081] By employing a dual design of main circuit breaker 31 and auxiliary circuit breaker 32, the power supply can be reliably cut off in the event of a fire, preventing the fire from spreading due to the failure to cut off the power supply.

[0082] Reference Figures 1-6 The surface of the distribution cabinet body 1 is equipped with a fire extinguishing component 5 for automatic fire extinguishing after a fire is detected by the 2. The fire extinguishing component 5 includes a thermal aerosol fire extinguishing device 51 fixed on the surface of the distribution cabinet body 1. The thermal aerosol fire extinguishing device 51 includes:

[0083] Initiator: A component that provides the initial energy necessary for the combustion reaction of an aerosol generator through electrical, thermal, chemical, or mechanical methods, such as an electrothermal initiator, which generates heat through electric current to initiate the combustion of the aerosol generator.

[0084] Aerosol generator and generator: An aerosol generator is a solid chemical mixture that can generate a thermal aerosol extinguishing agent through a combustion reaction. It is generally composed of oxidants, reducing agents and additives. An aerosol generator is a container that contains the aerosol generator and causes it to undergo a combustion reaction. It is usually a sealed structure to ensure that the combustion reaction takes place in a controlled environment.

[0085] Cooling device (agent): The thermal aerosol fire extinguishing device 51 generates high temperatures during the combustion reaction. The cooling device or coolant is used to reduce the temperature of the sprayed thermal aerosol to prevent the high temperature from causing damage to the protected objects and personnel. It also helps to improve the fire extinguishing effect. Coolant such as ceramic particles absorbs heat through heat exchange.

[0086] The outer casing serves to protect internal components, fixation devices, and prevent the leakage of combustion products. It is usually made of metal or high-strength plastic and has a certain strength and protection level, making it suitable for different installation environments.

[0087] Control device: Based on the signals from the arc sensor 21, temperature sensor 22, and smoke sensor 23, it determines whether to activate the thermal aerosol fire extinguishing device 51 and realizes linkage control with the arc sensor 21, temperature sensor 22, smoke sensor 23, and thermal aerosol fire extinguishing device 51. It is the "brain" of the entire fire extinguishing system. The control device includes the necessary control components, such as relay 1.

[0088] The outlet connector of the thermal aerosol fire extinguishing device 51 is connected to a fire extinguishing pipe 52 via a thread. The end of the fire extinguishing pipe 52 away from the thermal aerosol fire extinguishing device 51 is connected to a universal nozzle 53 for adjusting the fire extinguishing angle. The fire extinguishing pipe 52 is connected to the universal nozzle 53.

[0089] It should be noted that the control system module is connected to the relay in the thermal aerosol fire extinguishing device 51. When the temperature sensor 22 detects that the temperature exceeds the set threshold, the smoke sensor 23 detects that the smoke concentration exceeds the standard, and the arc sensor 21 detects an arc signal, the control system module will issue a command to start the thermal aerosol fire extinguishing device 51 to extinguish the fire inside the power distribution cabinet body 1.

[0090] The end of the fire extinguishing pipe 52 away from the thermal aerosol fire extinguishing device 51 is machined with a tapered pipe thread (NPT) or a cylindrical pipe thread (G). The thread surface is coated with high-temperature sealant (such as copper-based sealant, with a temperature resistance of over 300℃). The inlet of the universal nozzle 53 must be matched with the same specification thread and screwed directly into the fire extinguishing pipe 52. After tightening, leave 1-2 turns of thread allowance (to facilitate adjustment of the angle of the universal nozzle 53).

[0091] When the temperature sensor 22 detects that the temperature exceeds the set threshold, the smoke sensor 23 detects that the smoke concentration exceeds the standard, and the arc sensor 21 detects an arc signal, the control system module controls the thermal aerosol fire extinguishing device 51 to start, so that the hot melt adhesive in the thermal aerosol fire extinguishing device 51 is introduced into the fire extinguishing pipe 52 and into the universal nozzle 53. Then, the hot melt adhesive is sprayed from the universal nozzle 53 into the power distribution cabinet body 1 to extinguish the fire inside the power distribution cabinet body 1. At the same time, by rotating the universal nozzle 53, the angle of the hot melt adhesive sprayed by the universal nozzle 53 is adjusted, so that the angle of the universal nozzle 53 can be adjusted according to the installation position of the high fire incidence area inside the power distribution cabinet body 1, so that the universal nozzle 53 can better extinguish the fire incidence area inside the power distribution cabinet body 1.

[0092] Reference Figures 1-7 The surface of the power distribution cabinet body 1 is provided with a flow guiding component 6 for assisting the diffusion of the extinguishing agent. The flow guiding component 6 includes a flow guiding cylinder 61 fixed on the side of the power distribution cabinet body 1 near the surface of the extinguishing pipe 52. The inside of the flow guiding cylinder 61 is provided with a flow guiding cavity 611 for airflow. The end of the flow guiding cylinder 61 near the power distribution cabinet body 1 is inserted vertically at a 90-degree angle into the side of the power distribution cabinet body 1 near the surface of the thermal aerosol extinguishing device 51. The inner wall of the flow guiding cavity 611 is fixed with a miniature fan 62 for generating airflow. The inside of the flow guiding cavity 611 is fixed with a flow guiding plate 63. One side of the surface of the flow guiding plate 63 is provided with a flow guiding hole 631 for dispersing the airflow. The miniature fan 62 is in the off state when the arc sensor 21, temperature sensor 22, and smoke sensor 23 do not detect a fire. The miniature fan 62 is in the on state after the arc sensor 21, temperature sensor 22, and smoke sensor 23 detect a fire.

[0093] It should be noted that: Relay 2 is installed on the surface of the end of the guide tube 61 away from the main body of the power distribution cabinet 1. Relay 2 is connected to the control system module. When the temperature sensor 22 detects that the temperature exceeds the set threshold, the smoke sensor 23 detects that the smoke concentration exceeds the standard, and the arc sensor 21 detects an arc signal, the control system module controls the micro fan 62 to start, so that the micro fan 62 generates airflow.

[0094] By activating the thermal aerosol fire extinguishing device 51 and simultaneously controlling the micro fan 62 to start, the micro fan 62 generates airflow. The airflow flows within the guide cavity 611 and is discharged through the guide holes 631 on the guide plate 63, thereby accelerating the speed at which the extinguishing agent in the thermal aerosol fire extinguishing device 51 reaches the ignition point and thus improving the fire extinguishing speed of the thermal aerosol fire extinguishing device 51.

[0095] Reference Figure 1 The power distribution cabinet body 1 is equipped with an audible and visual alarm light 4 for issuing an alarm on one side of the surface near the fire extinguishing pipe 52.

[0096] It should be noted that the audible and visual alarm light 4 is connected to the control system module, so that the control module controls the opening and closing of the audible and visual alarm light 4 according to the signals emitted by the arc sensor 21, temperature sensor 22, and smoke sensor 23.

[0097] In the event of an electrical fire, the control system module controls the audible and visual alarm light 4 to emit an audible and visual alarm signal, alerting nearby personnel to take timely measures.

[0098] It should be added that the universal nozzle 53, the guide tube 61, and the guide hole 631 are all made of stainless steel.

[0099] Arc sensor 21 adopts Acrel ARCM610-D series, main circuit breaker 31 and auxiliary circuit breaker 32 adopt FJIB3 series, audible and visual alarm light 4 adopts FSG-103P-U series, thermal aerosol fire extinguishing device 51 adopts QRR0.1G series, temperature sensor 22 adopts K type thermocouple, and smoke sensor 23 adopts MQ2 series.

[0100] The implementation principle of an automatic electrical fireproof cabinet in this application embodiment is as follows: Before the distribution cabinet body 1 of this application is put into operation, the user needs to rotate the universal nozzle 53 to adjust the angle of the hot melt adhesive sprayed by the universal nozzle 53, so as to adjust the angle of the universal nozzle 53 according to the installation position of the high fire incidence inside the distribution cabinet body 1, so that the universal nozzle 53 can better extinguish the fire at the high fire incidence inside the distribution cabinet body 1.

[0101] In this application, during operation, the distribution cabinet body 1 uses an arc sensor 21 to monitor arc faults in the electrical circuits, promptly detecting potential fire hazards. A temperature sensor 22 monitors the cabinet temperature in real time, sending a signal when the temperature exceeds a set threshold. A smoke sensor 23 detects the smoke concentration inside the cabinet, also sending a signal when the smoke reaches a certain concentration. This allows for automatic detection of electrical fires. The diverse monitoring capabilities of the arc sensor 21, temperature sensor 22, and smoke sensor 23 enable automatic detection of electrical fires, achieving early warning and accurate identification of electrical fires. This provides time for rapid power cut-off and activation of fire extinguishing devices, minimizing fire losses.

[0102] When temperature sensor 22 alarms (e.g., only the temperature exceeds the limit), the system only issues a warning and does not trigger the operation of main circuit breaker 31 or auxiliary circuit breaker 32.

[0103] When the arc sensor 21 and temperature sensor 22 or the arc sensor 21 and smoke sensor 23 alarm simultaneously (e.g., arc + temperature exceeding the standard, smoke + arc), the system determines it as a "real fire" and initiates the power-off process. After confirming the fire, the control system module immediately outputs a control signal, which prioritizes triggering the tripping of the main circuit breaker 31 (outputting the signal within 0.1 seconds) to cut off the main power supply.

[0104] If no tripping feedback signal is received from the main circuit breaker 31 within 1 second (auxiliary contacts not disconnected), the auxiliary circuit breaker 32 is immediately triggered to ensure reliable power disconnection. Thus, by adopting the dual design of the main circuit breaker 31 and the auxiliary circuit breaker 32, the power supply can be reliably disconnected in the event of a fire, avoiding the spread of the fire due to the failure to disconnect the power supply.

[0105] At the same time, the control system module controls the audible and visual alarm light 4 to emit audible and visual alarm signals, reminding surrounding personnel to take timely measures, thereby ensuring the efficiency of surrounding personnel in handling electrical fires.

[0106] When the audible and visual alarm light 4 emits an audible and visual alarm signal, the control system module controls the thermal aerosol fire extinguishing device 51 to start, so that the hot melt adhesive in the thermal aerosol fire extinguishing device 51 is introduced into the fire extinguishing pipe 52 and into the universal nozzle 53. Then the hot melt adhesive is sprayed from the universal nozzle 53 into the interior of the power distribution cabinet body 1 to extinguish the fire point inside the power distribution cabinet body 1, thereby realizing automatic fire extinguishing when a fire is detected.

[0107] By simultaneously activating the thermal aerosol fire extinguishing device 51, the control system module controls the micro fan 62 to start, causing the micro fan 62 to generate airflow. The airflow flows within the guide cavity 611 and is discharged through the guide holes 631 on the guide plate 63, accelerating the speed at which the extinguishing agent in the thermal aerosol fire extinguishing device 51 reaches the ignition point, thereby improving the fire extinguishing speed of the thermal aerosol fire extinguishing device 51 and ensuring the fire resistance performance of the distribution cabinet body 1 during operation.

[0108] The above are merely optional embodiments of this application and are not intended to limit this application. Various modifications and variations can be made to this application by those skilled in the art. Any modifications, equivalent substitutions, improvements, etc., made within the spirit and principles of this application should be included within the protection scope of this application.

Claims

1. An automatic electrically fire protected cabinet, characterized in that: Includes a power distribution cabinet body (1), the power distribution cabinet body (1) is provided with a fire monitoring component (2) for monitoring fire, and the surface of the power distribution cabinet body (1) is provided with a fire extinguishing component (5) for automatically extinguishing fire after the fire is detected by (2); The fire extinguishing assembly (5) includes a fire extinguishing pipe (52) fixed on the surface of the power distribution cabinet body (1). The fire extinguishing pipe (52) is provided with a universal nozzle (53) for adjusting the fire extinguishing angle at one end inside the power distribution cabinet body (1). The surface of the power distribution cabinet body (1) is provided with a flow guiding assembly (6) for assisting the diffusion of the fire extinguishing agent. The flow guiding assembly (6) includes a flow guiding tube (61) fixed on the side of the distribution cabinet body (1) near the fire extinguishing pipe (52). The flow guiding tube (61) has a flow guiding cavity (611) for airflow. The end of the flow guiding tube (61) near the distribution cabinet body (1) is inserted vertically at 90 degrees on the side of the distribution cabinet body (1) near the thermal aerosol fire extinguishing device (51).

2. An automatic electrically fire protected cabinet according to claim 1, characterized in that: The fire monitoring component (2) includes an arc sensor (21) installed inside the power distribution cabinet body (1) and a temperature sensor (22) installed inside the power distribution cabinet body (1). The power distribution cabinet body (1) is equipped with a smoke sensor (23) for monitoring smoke inside the power distribution cabinet body (1). The temperature sensor (22) is located between the arc sensor (21) and the smoke sensor (23). The arc sensor (21), temperature sensor (22), and smoke sensor (23) are electrically connected to the micro fan (62).

3. An automatic electrically fire protected cabinet according to claim 2, characterized in that: The power distribution cabinet body (1) is equipped with a power supply sealing component (3) for automatically cutting off the power supply after a fire occurs; The power supply enclosure assembly (3) includes a main circuit breaker (31) fixed inside the power distribution cabinet body (1). The main circuit breaker (31) is electrically connected to an arc sensor (21), a temperature sensor (22), and a smoke sensor (23). A secondary circuit breaker (32) is provided on one side of the surface of the main circuit breaker (31) and is electrically connected to the arc sensor (21), the temperature sensor (22), and the smoke sensor (23). The secondary circuit breaker (32) is activated when the main circuit breaker (31) fails and cannot cut off the power supply.

4. An automatic electrically fire protected cabinet according to claim 1, characterized in that: The fire extinguishing assembly (5) also includes a thermal aerosol fire extinguishing device (51) fixed on the surface of the power distribution cabinet body (1), and the end of the fire extinguishing pipe (52) away from the universal nozzle (53) is fixed on one side of the surface of the thermal aerosol fire extinguishing device (51).

5. An automatic electrically fire protected cabinet according to claim 1, characterized in that: The inner wall of the flow guide cavity (611) is fixed with a miniature fan (62) for generating airflow, and the interior of the flow guide cavity (611) is fixed with a flow guide plate (63), and a flow guide hole (631) for dispersing airflow is opened on one side of the surface of the flow guide plate (63).

6. An automatic electrically fire protected cabinet according to claim 2, characterized in that: The micro fan (62) is in the off state when the arc sensor (21), temperature sensor (22), and smoke sensor (23) do not detect a fire, and the micro fan (62) is in the on state after the arc sensor (21), temperature sensor (22), and smoke sensor (23) detect a fire.

7. An automatic electrically fire protected cabinet according to claim 5, characterized in that: Both the guide tube (61) and the guide hole (631) are made of stainless steel.

8. An automatic electrical fireproof cabinet according to claim 1, characterized in that: The power distribution cabinet body (1) is equipped with an audible and visual alarm light (4) on one side of the surface near the fire extinguishing pipe (52) for issuing an alarm.

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